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Round|Lab Grown|IGI

1.67ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG764636382

Shape and cutting style on the report: Round brilliant

Certificate IGI LG764636382

Diamond specifications and retailer prices

From £173 GBP
$231 USD
As of October 29, 2026
Save £692 GBP (80%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £931 GBP at Brilliant Earth · As of October 22, 2026
View at Brilliant Earth

About this 1.67ct lab-grown round diamond

This 1.67ct lab-grown round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG764636382 or 764636382. Listed at 17 retailers as of October 29, 2026, with a 399% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.67
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG764636382
Dimensions7.63 × 7.65 × 4.68 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.63 mm7.65 mm1.67 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG764636382
Side View
Table 58.0%Crown 34.2°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £931 GBP|Low: £166 GBP|High: £954 GBP|Avg: £415 GBP|-2.4%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 29, 2026
Retailer 13£173 GBP
Retailer 3£194 GBP
Retailer 5£200 GBP
Retailer 14£215 GBP
Retailer 12£289 GBP
Retailer 9£356 GBP
Retailer 8£373 GBP
Retailer 2£402 GBP
Retailer 4£409 GBP
Retailer 11£548 GBP
Retailer 10£556 GBP
Retailer 6£690 GBP
Retailer 7£865 GBP
Brilliant Earth£931 GBP

43 data points across 14 retailers

17 retailers£173 GBP to £865 GBP

A
Cheapest Retailer
-
£173 GBP
$231 USD
A
Retailer 2
-
£194 GBP
$258 USD
View
Final sale: no returns
A
Retailer 3
-
£200 GBP
$267 USD
View
A
Retailer 4
-
£215 GBP
$286 USD
View
A
Retailer 5
-
£215 GBP
$286 USD
View
B+
Retailer 6
-
£289 GBP
$385 USD
View
A
Retailer 7
-
£356 GBP
€451 EUR
View
A
Retailer 8
-
£373 GBP
View
A
Retailer 9
-
£382 GBP
$509 USD
View
A
Retailer 10
-
£402 GBP
View
B+
Retailer 11
-
£409 GBP
$545 USD
View
B+
Retailer 12
-
£548 GBP
$730 USD
View
Retailer 13
-
£556 GBP
$740 USD
View
Price last confirmed 11 days ago
B
Retailer 14
-
£690 GBP
$919 USD
View
B
Retailer 15
-
£730 GBP
$972 USD
View
B
Retailer 16
-
£865 GBP
View
Most Expensive
Brilliant Earth
21313425A · Oct 22
£931 GBP
$1,240 USD
View
Price last confirmed 7 days ago
16 more retailers have this diamond
Prices start from £173 GBPSave up to £692 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.67ct Round
£173 GBP